https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/v/meet-the-skin 2023-08-17T23:33:36.770424498Z Meet the skin! (Overview) The integumentary system, including skin and appendages like nails and hair, serves as our body's largest organ. It's not just a barrier, but also an immune defender, a sensory conductor, and a thermoregulator. This system plays a crucial role in protecting us from external threats and maintaining our body's balance. Raja Narayan video https://cdn.kastatic.org/googleusercontent/mmeFwgeSQ7DdtcvPMGL2Y9bzQVbUhUExvSFR9PRKspEEVCEePcQTNJQ_wJ99xihD5sV9udeFj76dRFrHpW7eh1NZ Meet the skin! (Overview) The integumentary system, including skin and appendages like nails and hair, serves as our body's largest organ. It's not just a barrier, but also an immune defender, a sensory conductor, and a thermoregulator. This system plays a crucial role in protecting us from external threats and maintaining our body's balance. https://cdn.kastatic.org/ka-youtube-converted/4zKjzl0futI.mp4/4zKjzl0futI.mp4 316 Non-specific defence https://www.khanacademy.org/science/biology/human-biology/immunology/v/role-of-phagocytes-in-innate-or-nonspecific-immunity 2023-12-04T19:02:25.924542584Z Role of phagocytes in innate or nonspecific immunity The immune system's primary role is to protect the body from harmful pathogens. It employs two lines of defense for non-specific immunity: the first line, which includes skin and mucus membranes, aims to keep pathogens out. The second line, featuring phagocytes, targets pathogens that have entered the body. This non-specific or innate immune system does not distinguish between types of pathogens, but effectively eliminates them. Sal Khan video https://cdn.kastatic.org/googleusercontent/0mEstcMGG1U_whhSn4u68IUuVIuxoXKIY2lTP7-C1q4yfue58eDyfoRr7KU27i2mFYxJ4MwHvWOsOoqK8tHGttc Role of phagocytes in innate or nonspecific immunity The immune system's primary role is to protect the body from harmful pathogens. It employs two lines of defense for non-specific immunity: the first line, which includes skin and mucus membranes, aims to keep pathogens out. The second line, featuring phagocytes, targets pathogens that have entered the body. This non-specific or innate immune system does not distinguish between types of pathogens, but effectively eliminates them. https://cdn.kastatic.org/ka-youtube-converted/O1N2rENXq_Y.mp4/O1N2rENXq_Y.mp4 980 Non-specific defence https://www.khanacademy.org/science/grade-7-science-snc-aligned/x64f379bc07a3640a:immunity-and-diseases/x64f379bc07a3640a:non-specific-defence/a/innate-immunity 2021-05-25T21:59:58Z Innate immunity article https://www.khanacademy.org/science/biology/human-biology/immunology/v/inflammatory-response 2021-03-18T10:33:24Z Inflammatory response Overview of the inflammatory response. Sal Khan video https://cdn.kastatic.org/googleusercontent/CxxeN27svfwBsy7Q6fFMoIEE7YngCtY9jzRD1_-EssPJRYSUJTMRPws7tzs7VhE5WyCedZY-1rPK4KHWDSfRYCXP Inflammatory response Overview of the inflammatory response. https://cdn.kastatic.org/ka-youtube-converted/FXSuEIMrPQk.mp4/FXSuEIMrPQk.mp4 875 Non-specific defence